Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

How many sides does a circle have?

What is always in front of you but can’t be seen?

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

What goes up but never comes down?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?